Protein A, R-PE Conjugated
Catalog Number: P02-P0112R
Size: 100 µg
Description: Protein A is a cell wall component produced by several strains of Staphylococcus aureus that consists of a single polypeptide chain and contains little or no carbohydrate. Recombinant Protein A is produced in E.Coli and functions essentially the same as native Protein A. It consists of 5 IgG-binding domains E-D-A-B-C aligned in series. It migrates with an apparent molecular mass of 45kDa in SDS-PAGE.
Phycoethyrin (R-PE): R-PE is a 240 kDa protein from the light-harvesting complex, which is composed of a hexameric structure of alpha and beta chains andphycobilins. R-PE purified from Poryhyratenera.
Protein A, R-PE conjugate is a protein labled by Phycoethyrin.
Formulation: 100 µg of Protein A conjugated with R-PE in PBS.
Excitation Laer: Blue Laser (488 nm)/Green Laser (532 nm)/Yellow-Green Laser (566 nm)
Specificity: The interaction between Protein A and IgG is not equivalent for all species. Even within a species, Protein A interacts with some subclasses of IgG and not others. For instance, human IgG1, IgG2 and IgG4 bind strongly, while IgG3 does not bind. There are also many instances in which monoclonal antibodies do not bind to Protein A, especially the majority of rat immunoglobulins and mouse IgG1.
Applications: The Protein A molecule contains four high-affinity (Ka =108/mole) binding sites capable of interacting with the Fc region from IgG of several species including human and rabbit Optimal binding occurs a pH 8.2, although binding is also good at neutral or physiological conditions (pH 7.0-7.6).
Immunofluorescence (IF) 1: 50-1:200
Flow cytometry 1: 100-1:500.
Storage: 1 year at 2-8°C. Don’t freeze. Product shipped with an ice pack.
Usage: This material is for research, laboratory or further evaluation purposes.